React Js Format Number Example

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.development.js"></script>
    <script src="https://unpkg.com/@babel/standalone@7.14.7/babel.min.js"></script>
  </head>

<body>
    <div id="app"></div>
    <script type="text/babel">
      const { useState } = React;

function formatPhoneNumber(phoneNumber) {
        // Remove all non-digit characters from the phone number
        const cleaned = ("" + phoneNumber).replace(/\D/g, "");

// Apply formatting based on the length of the cleaned phone number
        let formattedNumber = "";
        if (cleaned.length === 10) {
          formattedNumber = cleaned.replace(
            /(\d{3})(\d{3})(\d{4})/,
            "($1) $2-$3"
          );
        } else if (cleaned.length === 11) {
          formattedNumber = cleaned.replace(
            /(\d{1})(\d{3})(\d{3})(\d{4})/,
            "+$1 ($2) $3-$4"
          );
        } else {
          formattedNumber = cleaned; // Return the original input if the length doesn't match the expected format
        }

return formattedNumber;
      }

function PhoneNumberFormatter() {
        const phoneNumber = "1234567890"; // Replace with your phone number

return (
          <div className="container">
            <h3>React Js Format phone Number</h3>
            <p>Original Phone Number: {phoneNumber}</p>
            <p>Formatted Phone Number: {formatPhoneNumber(phoneNumber)}</p>
          </div>
        );
      }

ReactDOM.render(<PhoneNumberFormatter />, document.getElementById("app"));
    </script>